Unable to chown a disk

I have many disk drives in an OWC Thunderbolt Flex 8. I had to take my Mac Studio into the "Genius Bar" and the reinstalled MacOS. This required setting up a now admin account on the boot disk. But now, some of the disks in the Flex 8 are owned by item 1. No other possible owners are listed in the info owner dropdown.

Even as root, I cannot run chown:

jamesarome@JARSTUDIO-2 ~ % cd /Volumes/MacHD3
jamesarome@JARSTUDIO-2 MacHD3 % ls -l
total 0
ls: .: Operation not permitted
jamesarome@JARSTUDIO-2 MacHD3 % pwd
/Volumes/MacHD3
jamesarome@JARSTUDIO-2 MacHD3 % sudo su
Password:
sh-3.2# ls -l
total 0
ls: .: Operation not permitted
sh-3.2# chown jamesarome:staff ./
chown: ./: Operation not permitted
sh-3.2#

I even copied the whole disk to another one, and when that was complete, the new disk exhibited the same issues. I cannot find any place to activate ignore ownership. The info pane for the disk exhibits a spinning dial trying to find the item 1 owner.

Help please!


Mac Studio, macOS 15.3

Posted on Feb 8, 2025 07:48 AM

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Question marked as Top-ranking reply

Posted on Feb 12, 2025 04:40 AM

Stupid question, but has to be asked. Have you granted Terminal Full Disk Access? System Settings > Privacy & Security > Full Disk Access.


I find that the most common cause of the "operating not permitted" is lack of full disk access rights.

12 replies

Feb 8, 2025 12:27 PM in response to jrome

so what is the problem? you appear to have all the access you need.

Here is what mine looks like:


ls -ale

total 0

drwxr-xr-x 14 root wheel 448 Feb 8 14:03 .

drwxr-xr-x 20 root wheel 640 Jul 17 2024 ..

drwxr-xr-x 3 root wheel 96 Feb 5 19:56 .timemachine

drwxrwxr-x 57 GrantH staff 2006 Feb 4 11:35 Install macOS Ventura

lrwxr-xr-x 1 root wheel 1 Feb 8 14:02 M11-P31 -> /

drwxrwxr-x@ 9 GrantH staff 288 Feb 6 15:26 OCLP 2.2.0

drwxr-xr-x 21 root wheel 672 Feb 6 14:23 S240-13

drwxrwxr-x@ 20 root admin 640 Feb 6 13:33 S240-13 - Data

drwxr-xr-x 21 root wheel 672 Feb 5 13:08 SEA

drwxrwxr-x@ 26 root wheel 832 Feb 5 20:05 SEA - Data

drwxr-xr-x 32 root wheel 1156 May 9 2024 X13-Drv80

drwxr-xr-x@ 24 root admin 768 Aug 2 2022 X15-SSD120

drwxr-xr-x@ 27 root wheel 864 Jan 26 00:26 X15-SSD120 - Data

drwxr-xr-x 3 root wheel 96 Jan 28 17:37 com.apple.TimeMachine.localsnapshots

GrantH@GrantsMacPro /volumes %


stuff is owned by root, wheel, and my Admin directly and it makes no difference at all.

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Unable to chown a disk

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